The hot weather is a health risk for people, but it's also bad news for the region's snowpack and could trigger an earlier start to wildfires.

ARLINGTON, Va. − The unrelenting heat wave that has baked the Midwest for days was expanding to the east on July 24 and promised temperatures approaching 100 degrees in New York, Philadelphia and Washington, D.C., by July 25. More than 130 million ...

Forecasters are warning not to leave kids or pets unattended in cars amid an unseasonably early and dangerous heatwave.

A long stretch of humid heat followed by intense thunderstorms is a weather pattern historically seen mostly in and around the tropics. But climate change is making humid heat waves and extreme storms more common in traditionally temperate midlatitude ...

A massive heat wave is hitting the Pacific Ocean from Kamchatka to California. Water temperatures several degrees above normal span thousands of miles, though they have mostly stopped short of the Pacific Northwest coast. Cool water welling up from the ...

Weather reports indicate a heat dome with highs in the 90s to low 100s is building over parts of the country this week — including the Northeast with a short, but significant, hot and humid spell coming July 25 and 26. New York and Philadelphia ...

A "heat dome," similar to a heat wave, is a high-pressure system trapping hot air and causing prolonged high temperatures. Heat domes differ from heat waves in their duration and the stagnant nature of the high-pressure system. Florida issues heat ...